h -= pow * uint32(s[i+n])
		if h == hashss && s[i:i+n] == substr {
			return i
		}
	}
	return -1
}

// IndexByte returns the index of the first instance of c in s, or -1 if c is not present in s.
func IndexByte(s string, c byte) int {
	return stringslite.IndexByte(s, c)
}

// IndexRune returns the index of the first instance of the Unicode code point
// r, or -1 if rune is not present in s.

func consume(s string, c byte) string {
	if s == "" || s[0] != c {
		return ""
	}
	return strings.TrimSpace(s[1:])
}

func split(s string, c byte) (head, tail string) {
	if i := strings.IndexByte(s, c); i >= 0 {
		return strings.TrimSpace(s[:i]), strings.TrimSpace(s[i+1:])
	}
	return strings.TrimSpace(s), ""
}

// Add hack mapping to deal with a small number of cases that occur

	v [8]byte
}

// NewValueError creates a new ValueError.
func NewValueError(tag []byte) ValueError {
	var e ValueError
	copy(e.v[:], tag)
	return e
}

func (e ValueError) tag() []byte {
	n := bytes.IndexByte(e.v[:], 0)
	if n == -1 {
		n = 8
	}
	return e.v[:n]
}

// Error implements the error interface.
func (e ValueError) Error() string {

	// If //go:build line is present, it controls, so no need to look for +build .
	// Otherwise, get plusBuild constraints.
	if goBuildBytes == nil {
		p := content
		for len(p) > 0 {
			line := p
			if i := bytes.IndexByte(line, '\n'); i >= 0 {
				line, p = line[:i], p[i+1:]
			} else {
				p = p[len(p):]
			}
			line = bytes.TrimSpace(line)
			if !bytes.HasPrefix(line, bSlashSlash) || !bytes.Contains(line, bPlusBuild) {

	if err != nil {
		return
	}

	for len(data) > 0 {
		// Get next line.
		line := data
		i := bytes.IndexByte(data, '\n')
		if i >= 0 {
			line, data = line[:i], data[i+1:]
		} else {
			data = nil
		}

		i = bytes.IndexByte(line, '=')
		if i < 0 || line[0] < 'A' || 'Z' < line[0] {
			// Line is missing = (or empty) or a comment or not a valid env name. Ignore.

	}

	// Successful execution without output indicates an empty repo (no commits).
	var rev string
	var commitTime time.Time
	if len(out) > 0 {
		// Strip trailing timezone offset.
		if i := bytes.IndexByte(out, ' '); i > 0 {
			out = out[:i]
		}
		rev, commitTime, err = parseRevTime(out)
		if err != nil {
			return Status{}, err
		}
	}

	// Also look for untracked files.

// line bytes. The remainder of the byte array (also not including the new line
// bytes) is also returned and this will always be smaller than the original
// argument.
func getLine(data []byte) (line, rest []byte) {
	i := bytes.IndexByte(data, '\n')
	var j int
	if i < 0 {
		i = len(data)
		j = i
	} else {
		j = i + 1
		if i > 0 && data[i-1] == '\r' {
			i--
		}
	}
	return bytes.TrimRight(data[0:i], " \t"), data[j:]
}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build ppc64 || ppc64le

#include "go_asm.h"
#include "textflag.h"

TEXT ·IndexByte<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-40
	// R3 = byte array pointer
	// R4 = length
	MOVD	R6, R5		// R5 = byte
	BR	indexbytebody<>(SB)

TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-32
	// R3 = string

var commentStart = []byte("<!--")
var commentEnd = []byte("-->")

// tText is the context transition function for the text state.
func tText(c context, s []byte) (context, int) {
	k := 0
	for {
		i := k + bytes.IndexByte(s[k:], '<')
		if i < k || i+1 == len(s) {
			return c, len(s)
		} else if i+4 <= len(s) && bytes.Equal(commentStart, s[i:i+4]) {
			return context{state: stateHTMLCmt}, i + 4
		}
		i++
		end := false

		case "json":
			// JSON allows using spaces in the name, so skip it.
			comma := strings.IndexRune(value, ',')
			if comma < 0 {
				continue
			}
			value = value[comma+1:]
		}

		if strings.IndexByte(value, ' ') >= 0 {
			return errTagValueSpace
		}
	}
	return nil